class_docstr: Test cases for "small data" conversion and I/O.
code: def test_to_clipboard(self):
      pdf = self.pdf
      psdf = self.psdf
  
      self.assert_eq(psdf.to_clipboard(), pdf.to_clipboard())
      self.assert_eq(
          psdf.to_clipboard(excel=False), pdf.to_clipboard(excel=False)
      )
      self.assert_eq(
          psdf.to_clipboard(sep=";", index=False),
          pdf.to_clipboard(sep=";", index=False),
      )
  
imports: import os
  import string
  import unittest
  import sys
  import numpy
  import pandas
  from pyspark import pandas
  from pyspark.testing.pandasutils import PandasOnSparkTestCase, TestUtils
  from pyspark.testing.sqlutils import SQLTestUtils
label_desc: Use image node_id 12 for calling the DataFrameConversionMixin obj's underlying member method code with example usage: obj.test_to_clipboard() without return types